Highly flame-retardant polymer member, flame-retardant article, and flame-retarding method

Abstract

Provided is a flame-retardant member having transparency, flexibility, and a high level of flame retardancy. A highly flame-retardant polymer member of the present invention is a highly flame-retardant polymer member including a polymer layer (B), an inorganic base material (L), and a flame-retardant layer (A) in the stated order, in which the flame-retardant layer (A) is a layer containing a layered inorganic compound (f) in a polymer.

1 . A highly flame-retardant polymer member, comprising a polymer layer (B), an inorganic base material (L), and a flame-retardant layer (A) in the stated order, wherein the flame-retardant layer (A) comprises a layer containing a layered inorganic compound (f) in a polymer (X). 
     
     
         2 . A highly flame-retardant polymer member according to  claim 1 , wherein the inorganic base material (L) comprises a fibrous inorganic base material. 
     
     
         3 . A highly flame-retardant polymer member according to  claim 2 , wherein the fibrous inorganic base material comprises a glass cloth. 
     
     
         4 . A highly flame-retardant polymer member according to  claim 1 , wherein in a horizontal firing test involving horizontally placing the highly flame-retardant polymer member with its side of the flame-retardant layer (A) as a lower surface so that the lower surface is in contact with air, placing a Bunsen burner so that a flame port of the Bunsen burner is positioned at a lower portion distant from the lower surface on the side of the flame-retardant layer (A) by 45 mm, and bringing a flame of the Bunsen burner having a height of 55 mm from the flame port into contact with the lower surface of the flame-retardant layer (A) for 30 seconds while preventing the flame from being in contact with an end portion of the highly flame-retardant polymer member, the highly flame-retardant polymer member has flame retardancy capable of blocking the flame. 
     
     
         5 . A highly flame-retardant polymer member according to  claim 1 , wherein a content of ash in the flame-retardant layer (A) is 3 wt % or more and less than 70 wt %. 
     
     
         6 . A highly flame-retardant polymer member according to  claim 1 , wherein the layered inorganic compound (f) in the flame-retardant layer (A) comprises a layered clay mineral. 
     
     
         7 . A highly flame-retardant polymer member according to  claim 1 , wherein the highly flame-retardant polymer member is obtained by
 laminating a syrupy polymerizable composition layer (a) formed of a polymerizable composition (α) containing a polymerizable monomer (m) and the layered inorganic compound (f), the inorganic base material (L), and a solid monomer-absorbing layer (b) containing a polymer (p) and capable of absorbing the polymerizable monomer (m), and   performing polymerization.   
     
     
         8 . A highly flame-retardant polymer member according to claim  1 , wherein the highly flame-retardant polymer member is obtained by laminating a solid layered inorganic compound-containing polymer layer (a′), which is obtained by polymerizing a polymerizable composition layer (a) formed of a polymerizable composition (α) containing a polymerizable monomer (m) and the layered inorganic compound (f), the inorganic base material (L), and a solid monomer-absorbing layer (b) containing a polymer (p) and capable of absorbing the polymerizable monomer (m). 
     
     
         9 . A highly flame-retardant polymer member according to  claim 1 , wherein the highly flame-retardant polymer member is obtained by
 laminating a syrupy polymerizable composition layer (a′) formed of a polymerizable composition (α) containing a polymerizable monomer (m 1 ) and the layered inorganic compound (f), the inorganic base material (L), and a syrupy polymerizable composition layer (b′) containing a polymerizable monomer (m 2 ) and a polymer (p 2 ), and   performing polymerization.   
     
     
         10 . A flame-retardant article, which is obtained by attaching the highly flame-retardant polymer member according to  claim 1  to an adherend.